<template>
	<div class="container">
		<!-- 头部固定栏 -->
		<mt-header fixed title="固定在顶部">
			<!-- 后退按钮 -->
			<span slot="left" @click="goback" v-show="flag">
				<mt-button icon="back">返回</mt-button>
			</span>
		</mt-header>
		<!-- 中间主体内容 -->
		<!-- 添加左右切换动画效果 -->
		<transition>
			<router-view></router-view>
		</transition>
		<!-- 底部固定栏 -->
		<nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-my " to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-my" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-my" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="badge">{{$store.getters.badgeCount}}</span></span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-my" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
	</div>
</template>

<script>
	export default {
		data(){
				return{
					flag:false
				}
			},
		created(){
			this.flag = this.$route.path === "/home"? false : true;
		},
		methods:{
			goback(){
				this.$router.go(-1)
			}
		},
		watch:{  //监视路由地址改变,如果在home页面,就隐藏返回标志
			'$route.path':function(newVal){
				if(newVal === "/home") {
					this.flag = false
				}else {
					this.flag = true
				}
			}
		}
	}
</script>


<style lang="scss" scoped>
	.mint-header {
		z-index: 99;
	}
	.container {
		padding-top: 40px;
		padding-bottom: 50px;
	}
	// 添加切换动画效果
	.v-enter {
		opacity: 0;
		transform: translateX(100%);
	}
	.v-leave-to {
		opacity: 0;
		transform: translateX(-100%);
		position: absolute; //这个是为了实现平滑效果
	}
	.v-enter-active,
	.v-leave-to {
		transition: all 0.5s ease;
	}
	.container {
		overflow-x: hidden; //这个为了在切换tabbar的时候,路由在进来的时候不会出现水平滚动条
	}
	//由于Mui默认禁止a连接的跳转行为,所以把样式名修改掉
	.mui-bar-tab .mui-tab-item-my {
		display: table-cell;
		overflow: hidden;
		width: 1%;
		height: 50px;
		text-align: center;
		vertical-align: middle;
		white-space: nowrap;
		text-overflow: ellipsis;
		color: #929292;
	}
	.mui-bar-tab .mui-tab-item-my.mui-active {
		color: #007aff;
	}
	.mui-bar-tab .mui-tab-item-my .mui-icon {
		top: 3px;
		width: 24px;
		height: 24px;
		padding-top: 0;
		padding-bottom: 0;
	}
	.mui-bar-tab .mui-tab-item-my .mui-icon~.mui-tab-label {
		font-size: 11px;
		display: block;
		overflow: hidden;
		text-overflow: ellipsis;
	}
</style>
